PVC Pipe/Fittings ($20)
PVC Glue ($5)
Auralex Mineral Fiber ($20)
BUILDING THE PVC FRAME
First determine the size of the surface that you will be building for. In this case it was a 2′ x 4′ Auralex mineral fiber panel. This is being used mostly for recording vocals so I wanted it to sit higher up off the ground to block out room reflections.
The base of the legs use a “double tee” with two 90 degree elbows attached.
The base of the surface uses a “sanitary tee” which allows you to run the pipe across horizontally and continue running the pipe vertically to the top.
One more set of 90 degree fittings are used to complete the top corners.
Now that you have the structure built the tricky part is getting the mineral fiber to stay in place. I had good luck using a couple of light-load straps that I found for a few dollars each at the local home improvement store
CUTTING PIPE – I had access to a miter saw which made cutting the pipe lengths really easy. You can also use a Sawzall or similar. PVC cutting tools can also be found at your local hardware store. When measuring the pipe for your surface be sure to account for 3/4′ on each side where the pipe inserts into the fitting. For my two foot horizontal run I cut a length of pipe 25.5 inches. Also, be aware that PVC pipe is toxic when heated up so work in a ventilated room and use a mask.
GLUING – Make sure that your pipe ends and fittings are clean and be aware that PVC glue dries very quickly.
Finally, measure around the frame for the fabric then cut and sew it into a large pillow case. Slip it over the top and your gobo is complete.
* I was able to locate some Auralex mineral fiber panels for sale Craigslist which brought the cost of the panel down to around $5. As an alternative, you could try some other rigid insulation boards that can be found at a home improvement store. They may not be quite as effective but still do the job.